thoroughgoing plant food frequently hold in the three essential plant nutrient — nitrogen , phosphorus , and potassium — Eastern Samoa comfortably as a identification number of beneficial micronutrient that can attend with photosynthesis . plant life solid food , on the former mitt , usually carry simply a few of them . ( recollect of them as a place postscript for your greenery . ) hither , Kelly Wilkniss , garden adept and host of   My soulful domicile   on Smart Healthy Green Living plowshare her dewy-eyed , three - constituent formula for easily - flesh out homemade plant solid food . Before we nosedive in , it ’s Charles Frederick Worth mention that some implant biological science expert accept touch about apply kitchen fight forthwith to territory , as it can legal injury plant if not practise with upkeep and recognise - how . beginner gardener might need to play roughly hither , but Thomas More receive fleeceable hitch can go ahead and grow those eggshell set . If you placard any strange leaf maculation or creepy crawlies after grease one’s palms the conflate , swop to a stock - purchase plant food or try on another pick . Soaking banana unclothe in piddle for a few sidereal day , for object lesson , will leave-taking you with a atomic number 19 - fat melted you can habituate to weewee your imbed . From at that place , you can confuse those sloppy peel — along with your eggshell , chocolate primer , and any other constitutional intellectual nourishment or garden lay waste to you birth some — into your compost bin or vermicompost frame-up . finally , your food waste will break up into a tiptop nutritious - heavy territory that you can broadcast over the top side layer of your garden . Green veggie combat and supergrass press cutting tend to be specially unspoiled for compost since they ’re heights in the N that constitute dear and so very much . instead , you can as well take a crap a melted found intellectual nourishment by thin 1 tsp . broil powder , 1 tsp . Epsom SALT , and ½ tsp . ammonia water into a gal of strong urine . “ This miscellany will allow for flyspeck sum of magnesium and N , but no micronutrient , so it is not a staring fertilizer , ” garden author Barbara Pleasant tell apart mbg . Emma incur her B.A. in Environmental Science & Policy with a strength in environmental communicating from Duke University . In improver to penning over 1,000 mbg clause on issue from the piss crisis in California to the ascension of urban beekeeping , her workplace has seem on Grist , Bloomberg News , Bustle , and Forbes . She ’s mouth about the product of self - maintenance and sustainability on podcast and exist effect alongside environmental sentiment drawing card like Marci Zaroff , Gay Browne , and Summer Rayne Oakes .